PROBLEM TO BE SOLVED: To provide a photopolymerizable dental composition having little color tone change between before and after its curing, exhibiting an excellent photopolymerizability by the irradiation of a wide width of wavelength region, and excellent in thin layer surface curability, and a photopolymerization initiator used for the same.SOLUTION: This visible light-polymerizable dental composition is characterized by not substantially containing an amine compound as a photo-sensitizer, and containing a 0.01 to 10 pts.wt. (bis)acylphosphine oxide compound, a 0.01 to 10 pts.wt. &alpha-diketone compound and a 100 pts.wt. polymerizable monomer.COPYRIGHT: (C)2009,JPO&INPIT【課題】硬化前後の色調変化が少なく、幅広い波長領域での照射に対して優れた光重合性を発現し、薄層表面硬化性に優れた光重合型の歯科用組成物およびそれに用いる光重合開始剤を提供すること。【解決手段】光増感剤としてアミン化合物を実質的に含まず、(ビス)アシルホスフィンオキサイド化合物0.01~10重量部、α-ジケトン化合物0.01~10重量部、および重合性モノマー100重量部を含むことを特徴とする可視光重合性歯科用組成物。【選択図】なし
